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PHP | DOMProcessingInstruction __construct() Function

Last Updated : 12 Dec, 2021
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The DOMProcessingInstruction::__construct() function is an inbuilt function in PHP which is used a new read-only DOMProcessingInstruction object. To create a writable node, use DOMDocument::createProcessingInstruction.
Syntax: 

public DOMProcessingInstruction::__construct( string $name, string $value )

Parameters: This function accept two parameters as mentioned above and described below: 

  • $name: It specifies the tag name of the processing instruction.
  • $value: It specifies the value of the processing instruction.

Below given programs illustrate the DOMProcessingInstruction::__construct() function in PHP:
Program 1: Press Ctrl+U to see the DOM 

php




<?php
 
// Create a new DOMDocument instance
$dom = new DOMDocument();
 
// Create a html element
$html = $dom->appendChild(new DOMElement('html'));
 
// Create a body element
$body = $html->appendChild(new DOMElement('body'));
 
// Create a new DOMProcessingInstruction node
$pinode = new DOMProcessingInstruction('php',
          'echo "GeeksforGeeks"; ');
 
// Append the child
$body->appendChild($pinode);
 
// Render the XML
echo $dom->saveXML();
?>
 






                        










Output: 
 




Program 2: Press Ctrl+U to see the DOM element. 
 




php














                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















<?php


 


// Create a new DOMDocument instance


$dom = new DOMDocument();


 


// Create a html element


$html = $dom->appendChild(new DOMElement('html'));


 


// Create a body element


$body = $html->appendChild(new DOMElement('body'));


 


// Create a new DOMProcessingInstruction node


$pinode = new DOMProcessingInstruction('xml-stylesheet',


       'type="text/xsl" href="base.xsl"');


 


// Append the child


$body->appendChild($pinode);


 


// Render the XML


echo $dom->saveXML();


?>



















                        







                        










Output: 
 




Reference: https://www.php.net/manual/en/domprocessinginstruction.construct.php
 




                            
                            
                        


                                                                              

                                        

                                                                                

                                                                

                            
                                

                                
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